#include<stdio.h>
int main()
{
	int row, col;     //4*5的矩阵
	for (row = 1; row <= 4; row++)
	{
		for (col = 1; col <= 5; col++)
		{
			printf("%5d", col * row);
		}
		printf("\n");
	}
	return 0;
}